HARVARD MUSEUM OF NATURAL HISTORY Get up close and personal with one of the world’s only mounted Kronosauruses, a marine reptile stretching 42 feet. Daily 9 a.m.-5 p.m. $6-$9. 26 Oxford St., Cambridge. 617-495-3045, www.hmnh.harvard.edu

THE CHILDREN’S MUSEUM IN EASTON Equipped with a rocket ship and command center, one of the exhibits allows children to seem to blast into space and receive a commemorative badge. Tue-Fri 9 a.m.-5 p.m., Sat-Sun noon-5 p.m. Free-$7. 9 Sullivan Ave., North Easton. 508-230-3789, www.childrensmuseumineaston.org

CONNECTICUT CHILDREN’S MUSEUMThe words of the beloved classic “Goodnight Moon’’ fill large magnets, in different languages and Braille, so children can assemble them across a large magnetic wall. Fri-Sat noon-5 p.m. $7.50. 22 Wall St., New Haven. 203-562-5437, www.childrensbuilding.org

MAPLE GROVE FARMS OF VERMONTLearn about how farmers used to gather sap and boil it down and about modern sugaring in the Sugar House Museum. Mon-Fri 8 a.m.-5 p.m., Sat-Sun 9 a.m.- 5 p.m. Free. 1052 Portland St., St. Johnsbury, Vt. 802-748-5141, www.maplegrove.com

CHILDREN’S MUSEUM AND THEATRE OF MAINE Visit “What About Whales?’’ an exhibit in which Istar, a life-size inflatable whale, is lowered so that you can climb inside and learn all about how the mammal functions in her natural environment. Tue-Sat 10 a.m.-5 p.m., Sun noon-5 p.m. Free-$9. 142 Free St., Portland, Maine. 207-828-1234, www.kitetails.org

THE CHILDREN’S MUSEUM OF NEW HAMPSHIRE Play paleontologist for the day in the Dinosaur Dig with your own goggles as you unearth Triceratops fossil replicas and compare them with other dinosaur fossils. Tue-Sat 10 a.m.-5 p.m., Sun noon-5 p.m. Free-$9. 6 Washington St., Dover, N.H. 603-742-2002, www.childrens-museum.org